Heel-nail



(No Model.) I

G. A. CURTIS.

HEEL NAIL; v No, 574,140. Patented Dec; 29, 1896 \X/ Ev I I I UNITEl) STATES PATENT OFFICE.

GEORGE A. CURTIS, OF MALDEN, MASSACHUSETTS, ASSIGNOR TO CHARLES F. BAKER, OF BOSTON, MASSACHUSETTS.

HEEL-NAIL.

SPECIFICATION forming part of Letters Patent No. 574,140, dated December 29, 1896.

Application filed June 11, 1895. Serial No, 552,426. (No model.)

To all whom it may n the same and ready to be engaged with the Be it known that I, GEORGE A. CURTIS, of top lift. Malden,in the county of Middlesex and State The same letters of reference indicate the of Massachusetts, have invented certain new same parts in all the figures. and useful Improvements in Heel-Nails, of In the drawings, a represents a nail, which which the following is a specification. is preferably made of cylindrical wire and is This invention relates to so-called collarprovided at one end with a suitable penetratnails, used in nailing on boot and shoe heels. ing and clenching point a and at its other A collar-nail usually has a clenching-point at end with a spur having in its outer portion a 10 one end and a collar or flange near its opponotch or recess o adapting the end of the site end adapted to bear on the face of the spur to be spread or enlarged, as hereinafter body of a heel into which the nail is driven described, to form what may be considered a prior to the application of the top lift, said head to engage the top lift. collar limiting the depth of penetration of On the body of the nail I form a collar or 15 the nail and causing its outer end to stand flange a the diameter of which is considerout from the body of the heel far enough to ably greater than that of the body of the nail. constitute a spur adapted to penetrate a top Said collar forms the head of the body porlift which is driven or spanked onto the heel tion of the nail and the base of the spur. after said nails have been driven. The distance between the collar and the 20 It is the object of my invention to provide extremity of the spur is greater than the opa nail of this class adapted to be made from erative length of the spur, the sides of the wire and to have its projecting spur portion recess constituting surplus stock, which is spread or enlarged while it is being driven to adapted to be spread or forced outwardly by form a head which shall engage the top lift a suitably-formed driver, as hereinafter de- 25 and prevent the latter from being readily scribed, and form a head or enlargement at pulled off from the nail. the outer end of the spur, the spreading op- To this end the invention consists in a nail eration reducing the spur to the desired ophavinga clenching-point at one end, a notched erative length. or recessed spur at the other end, and an in- The nail above described is adapted to 00- o termediate collar forming the head of the body operate with the peculiarly-formed driver 1), portion of the nail and the base of the spur, (shown in Figs. 2 and 3,) said driver having the distance between the said collar and the a cavity the inner end or bottom b of which outer end of the spur being greater than the forms an acting face adapted to spread the operative length of the spur, so that the rerecessed end of the spur, as shown in Fig. 3, 5 cessed end may be spread to form a head or thus forming the head shown in Figs. 3 and enlargement and at the same time reduce the 4:. The said driver has also an annular actspur to its operative length by the action of a ing face 11 which surrounds the said cavity suitable driver, the collar serving as a guard and is formed to bear upon the collar 00, the to limit the spreading action of the driver cavity being of greater diameter than the 0 0 and thus determine the operative length of spur, so thatthe recessed end of the spur may the spur. be spread within the cavity to form the head. Of the accompanying drawings, forming a The depth of the cavity is slightly less than part of this specification, Figure 1 represents the original length of the spur, so that when a side elevation of a nail embodying my imthe driver descends upon the nail the acting 45 provement. Fig. 2 is a similar view showing face I) will strike the recessed end of the nail also in section the driver used to drive the before the annular acting face I) comes to a improved nail. Fig. 3 represents avieW simibearing on the collar a The result is that lar to Fig. 1 after the driver has enlarged or the spur is spread sufficiently to form the spread the outer end of the spur. Fig. 4 rep-- head before the driver comes to a bearing on I00 50 resents a sectional view showing a portion of the collar to, further spreading of the spur a heel-body and my improved nail driven into being prevented by the contact of the driver with the collar, the latter sustaining the principal pressure required to drive the nail, and

thus determining the operative length of the spur. It will be seen, therefore, that by providing a nail with a recessed spur of greater than operative length and a collar at the base of the spur I am enabled to form a head on the spur and at the same time reduce it to its operative length by the act of driving the nail, the collar determining the size of the head, so that it cannot be distorted or made larger than is desirable. Itis-important that the spreading of the recessed end of the spur be comparatively slight, so that it will not offer too great resistance to the driving or spanking of the top lift onto the spur, and, further, so that the leather of the top lift may contract or close around the spur between the enlarged outer end and the collar. The collar of therefore acts to prevent excessive e11- largement of the spur and insures its proper length when the nail is fully driven.

I claim As an article of maiiufacturo, a nail havin g a clenching-point atone end, anotched or recessed spur at the other end, and an intermediate collar forming the head of the body portion of the nail and the base of the spur, the distance between the said collar and the outer end of the spur being greater than the operative length of the spur, so that the recessed end may be spread to form a head or enlargement and at the same time reduce the spur to its operative length, by the action of a suitable driver, the collar serving asa guard to limit the spreading action of the driver and thus determine the operative length of the spur.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing Witnesses, this 8th day of June, A. D. 1895.

GEORGE A. CURTIS. Witnesses (J. F. BROWN, A. I). HARRISON. 

